Which has more kinetic energy: a 0.0010-kg bullet traveling at 394 m/s or a 7.3 107-kg ocean liner traveling at 12 m/s (23 knots)?
Ek-bullet = ?J
Ek ocean liner = ?J
Seriously? What do you think would happen if you shot the liner head on with your little bullet?.....would it be pushed backwards or stopped?
KE = 1/2 m v^2 Bullet = 77.61 j Liner = 5263704 j
EP: You were too generous with the questioner in calculating the KE as:5,263,704 j. You took the mass of the Ocean Liner as 73,107 Kg, or ~73 tonnes. An Ocean Liner can in fact have a mass of between 50,000 - 100,000 metric tonnes. The questioner means: 7.3 x 10^7 Kg=73,000 metric tonnes!!. Therefore, the KE of the Ship would be:5,256,000,000 J.